Stuttgart 2012 – wissenschaftliches Programm
Q 35.77: Poster
Mittwoch, 14. März 2012, 16:30–19:00, Poster.I+II
Realization and prospects of highly efficient up-conversion from 1550 nm to 532 nm — •Christina E. Vollmer1, Christoph Baune1, Aiko Samblowski1, Jaromír Fiurášek2, and Roman Schnabel1 — 1Institut für Gravitationsphysik, Leibniz Universität Hannover and Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Callinstr. 38, 30167 Hannover, Germany — 2Department of Optics, Palacký University, 17. listopadu 50, 77200 Olomouc, Czech Republic
Highly efficient up-conversion processes allow the generation of continuous wave squeezed vacuum states into the visible wavelength range. Here, we report on an experiment where a weak (2 mW) coherent signal field at 1550 nm is converted into a 532 nm field. We use the sum frequency generation process in a doubly resonant optical parametric oscillator which is pumped with an 810 nm field. An optimum set of parameters yielded to a conversion efficiency of (84.4 ± 1.5) %. This high value allows the transfer of the quantum state of the 1550 nm field into the 532 nm field , so that the experiment seems applicable to generate continuous wave squeezed vacuum states in the visible wavelength range. For that purpose the coherent 1550 nm field will be replaced by a squeezed vacuum field at 1550 nm generated in an independent experiment. This field is converted into a 532 nm squeezed vacuum field which will further increase the sensitivities of quantum metrology applications and opens possibilities in quantum information.
 P. Kumar. Quantum frequency conversion. Optics letters, 15(24):1476-8, December 1990.